The extensive documentation already collected there and elsewhere will surely have a lasting impact on the ongoing scholarly debate on this topic. The present book is intended to contribute to this debate by addressing controversial issues relating to the interpretation and application of some important provisions of the new sales law. In addition, several authors also deal with the development of international principles of contract law, such as the Principles of European Contract Law, the UNIDROIT Principles and the lex mercatoria . In view of the increasing number of such rules, a discussion of the CISG would be incomplete without taking account of the relationship of the Convention to these principles as well.